import axios from 'axios'
import { MessageBox, Message, Loading } from 'element-ui'
import store from '@/store'
import { TokenKey, getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/hongke'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'

const SUCCESS_CODE = 200
const REDIRECT_CODE = 201
const UNLOGIN_CODE = 1003
const LOGIN_VALID_CODE = 1006
const SERVER_ERROR_CODE = 500

let downloadLoadingInstance
// 是否显示重新登录
export const isRelogin = { show: false }

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  // baseURL: window.baseUrl,
  // 超时
  timeout: 60000
})

// request拦截器
service.interceptors.request.use(
  (config) => {
    // 是否需要设置 token
    const isToken = (config.headers || {}).isToken === false
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
    // removeToken()
    if (getToken() && !isToken) {
      config.headers[TokenKey] = getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
    }

    if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
      const requestObj = {
        url: config.url,
        data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
        time: new Date().getTime()
      }
      const sessionObj = cache.session.getJSON('sessionObj')
      if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
    return config
  },
  (error) => {
    console.log(error)
    Promise.reject(error)
  }
)

// 响应拦截器
service.interceptors.response.use(
  (res) => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || SUCCESS_CODE
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default']
    // 数据直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer' || code == REDIRECT_CODE) {
      return res.data
    }
    // 请求成功，返回数据值
    if (code === SUCCESS_CODE) {
      return res.data.data
    }

    if (code === UNLOGIN_CODE) {
      if (!isRelogin.show) {
        isRelogin.show = true
        MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning'
        })
          .then(() => {
            isRelogin.show = false
            store.dispatch('LogOut').then(() => {
              location.href = '/'
            })
          })
          .catch(() => {
            isRelogin.show = false
          })
      }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === LOGIN_VALID_CODE) {
      return Promise.reject(msg)
    } else if (code === SERVER_ERROR_CODE) {
      msgError(msg)
      return Promise.reject(new Error(msg))
    } else if (code !== SUCCESS_CODE) {
      msgError(msg)
      return Promise.reject('error')
    }
  },
  (error) => {
    console.log('err' + error)
    let { message } = error
    if (message == 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    msgError(message)
    return Promise.reject(error)
  }
)

// export default service
export default function request(data) {
  const specialFileType = ['Blob', 'File']
  // get请求映射params参数
  if (data.method === 'get' && data.params) {
    let url = data.url + '?' + tansParams(data.params)
    url = url.slice(0, -1)
    data.params = {}
    data.url = url
  }
  return service(data)
}

export function get(url, params) {
  return request({
    url: url,
    params,
    method: 'get'
  })
}

// get 请求下载
export function downLoadFile(url, params) {
  return request({
    method: 'get',
    url: url,
    params: params,
    headers: { 'Content-Type': 'application/json,charset=utf-8' },
    responseType: 'arraybuffer' // 二进制流
  })
}

export function post(url, params) {
  return request({
    url: url,
    data: params,
    method: 'post'
  })
}
export function del(url, params) {
  return request({
    url: url,
    data: params,
    method: 'delete'
  })
}
export function postWithUnAuth(url, params) {
  return request({
    url: url,
    headers: { isToken: false },
    data: params,
    method: 'post'
  })
}

// 通用下载方法
export function download(url, params, filename, type) {
  downloadLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)'
  })
  return service
    .post(url, params, {
      transformRequest: [
        (params) => {
          if (!type) {
            return tansParams(params)
          } else {
            return JSON.stringify(params)
          }
        }
      ],
      headers: { 'Content-Type': 'application/json' },
      responseType: 'blob'
    })
    .then(async (data) => {
      const isLogin = await blobValidate(data)
      if (isLogin) {
        const blob = new Blob([data])
        saveAs(blob, filename)
      } else {
        const resText = await data.text()
        const rspObj = JSON.parse(resText)
        const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
        msgError(errMsg)
      }
      downloadLoadingInstance.close()
    })
    .catch((r) => {
      console.error(r)
      msgError('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close()
    })
}

// 通用下载方法 get请求
export function gDownload(url, params, filename) {
  downloadLoadingInstance = Loading.service({
    text: '正在下载数据，请稍候',
    spinner: 'el-icon-loading',
    background: 'rgba(0, 0, 0, 0.7)'
  })
  return downLoadFile(url, params)
    .then(async (data) => {
      const isLogin = await blobValidate(data)
      if (isLogin) {
        const blob = new Blob([data])
        saveAs(blob, filename)
      } else {
        const resText = await data.text()
        const rspObj = JSON.parse(resText)
        const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
        Message.error(errMsg)
      }
      downloadLoadingInstance.close()
    })
    .catch((r) => {
      console.error(r)
      Message.error('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close()
    })
}

export function upload(url, params) {
  return service({
    method: 'post',
    url: url,
    headers: {
      'Content-Type': 'multipart/form-data'
    },
    transformRequest: [
      function () {
        return params
      }
    ],
    params: params
  })
}

function msgError(msg) {
  Message({
    message: msg,
    type: 'error'
  })
}
